The sample will be recruited through the participating schools. Each school will recruit young women in groups (one or two groups per year-cohort depending on the size of the school and the level of involvement). The average size of each group will be 12 girls of whom 6 will be randomised to T&T and 6 to the control group (with an additional 4 girls recruited as reserves for every group, half of whom would if necessary be randomised to T&T and half randomised to the control group).